Devin Heitmueller | cb1c0f8 | 2010-03-13 17:10:24 -0300 | [diff] [blame] | 1 | /* |
| 2 | * ngene-i2c.c: nGene PCIe bridge driver i2c functions |
| 3 | * |
| 4 | * Copyright (C) 2005-2007 Micronas |
| 5 | * |
| 6 | * Copyright (C) 2008-2009 Ralph Metzler <rjkm@metzlerbros.de> |
| 7 | * Modifications for new nGene firmware, |
| 8 | * support for EEPROM-copying, |
| 9 | * support for new dual DVB-S2 card prototype |
| 10 | * |
| 11 | * |
| 12 | * This program is free software; you can redistribute it and/or |
| 13 | * modify it under the terms of the GNU General Public License |
| 14 | * version 2 only, as published by the Free Software Foundation. |
| 15 | * |
| 16 | * |
| 17 | * This program is distributed in the hope that it will be useful, |
| 18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 20 | * GNU General Public License for more details. |
| 21 | * |
| 22 | * |
| 23 | * You should have received a copy of the GNU General Public License |
| 24 | * along with this program; if not, write to the Free Software |
| 25 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 26 | * 02110-1301, USA |
| 27 | * Or, point your browser to http://www.gnu.org/copyleft/gpl.html |
| 28 | */ |
| 29 | |
| 30 | /* FIXME - some of these can probably be removed */ |
| 31 | #include <linux/module.h> |
| 32 | #include <linux/init.h> |
| 33 | #include <linux/delay.h> |
| 34 | #include <linux/slab.h> |
| 35 | #include <linux/poll.h> |
| 36 | #include <linux/io.h> |
| 37 | #include <asm/div64.h> |
| 38 | #include <linux/pci.h> |
| 39 | #include <linux/pci_ids.h> |
| 40 | #include <linux/smp_lock.h> |
| 41 | #include <linux/timer.h> |
| 42 | #include <linux/version.h> |
| 43 | #include <linux/byteorder/generic.h> |
| 44 | #include <linux/firmware.h> |
| 45 | #include <linux/vmalloc.h> |
| 46 | |
| 47 | #include "ngene.h" |
| 48 | |
| 49 | /* Firmware command for i2c operations */ |
| 50 | static int ngene_command_i2c_read(struct ngene *dev, u8 adr, |
| 51 | u8 *out, u8 outlen, u8 *in, u8 inlen, int flag) |
| 52 | { |
| 53 | struct ngene_command com; |
| 54 | |
| 55 | com.cmd.hdr.Opcode = CMD_I2C_READ; |
| 56 | com.cmd.hdr.Length = outlen + 3; |
| 57 | com.cmd.I2CRead.Device = adr << 1; |
| 58 | memcpy(com.cmd.I2CRead.Data, out, outlen); |
| 59 | com.cmd.I2CRead.Data[outlen] = inlen; |
| 60 | com.cmd.I2CRead.Data[outlen + 1] = 0; |
| 61 | com.in_len = outlen + 3; |
| 62 | com.out_len = inlen + 1; |
| 63 | |
| 64 | if (ngene_command(dev, &com) < 0) |
| 65 | return -EIO; |
| 66 | |
| 67 | if ((com.cmd.raw8[0] >> 1) != adr) |
| 68 | return -EIO; |
| 69 | |
| 70 | if (flag) |
| 71 | memcpy(in, com.cmd.raw8, inlen + 1); |
| 72 | else |
| 73 | memcpy(in, com.cmd.raw8 + 1, inlen); |
| 74 | return 0; |
| 75 | } |
| 76 | |
| 77 | static int ngene_command_i2c_write(struct ngene *dev, u8 adr, |
| 78 | u8 *out, u8 outlen) |
| 79 | { |
| 80 | struct ngene_command com; |
| 81 | |
| 82 | |
| 83 | com.cmd.hdr.Opcode = CMD_I2C_WRITE; |
| 84 | com.cmd.hdr.Length = outlen + 1; |
| 85 | com.cmd.I2CRead.Device = adr << 1; |
| 86 | memcpy(com.cmd.I2CRead.Data, out, outlen); |
| 87 | com.in_len = outlen + 1; |
| 88 | com.out_len = 1; |
| 89 | |
| 90 | if (ngene_command(dev, &com) < 0) |
| 91 | return -EIO; |
| 92 | |
| 93 | if (com.cmd.raw8[0] == 1) |
| 94 | return -EIO; |
| 95 | |
| 96 | return 0; |
| 97 | } |
| 98 | |
| 99 | static void ngene_i2c_set_bus(struct ngene *dev, int bus) |
| 100 | { |
| 101 | if (!(dev->card_info->i2c_access & 2)) |
| 102 | return; |
| 103 | if (dev->i2c_current_bus == bus) |
| 104 | return; |
| 105 | |
| 106 | switch (bus) { |
| 107 | case 0: |
| 108 | ngene_command_gpio_set(dev, 3, 0); |
| 109 | ngene_command_gpio_set(dev, 2, 1); |
| 110 | break; |
| 111 | |
| 112 | case 1: |
| 113 | ngene_command_gpio_set(dev, 2, 0); |
| 114 | ngene_command_gpio_set(dev, 3, 1); |
| 115 | break; |
| 116 | } |
| 117 | dev->i2c_current_bus = bus; |
| 118 | } |
| 119 | |
| 120 | static int ngene_i2c_master_xfer(struct i2c_adapter *adapter, |
| 121 | struct i2c_msg msg[], int num) |
| 122 | { |
| 123 | struct ngene_channel *chan = |
| 124 | (struct ngene_channel *)i2c_get_adapdata(adapter); |
| 125 | struct ngene *dev = chan->dev; |
| 126 | |
| 127 | down(&dev->i2c_switch_mutex); |
| 128 | ngene_i2c_set_bus(dev, chan->number); |
| 129 | |
| 130 | if (num == 2 && msg[1].flags & I2C_M_RD && !(msg[0].flags & I2C_M_RD)) |
| 131 | if (!ngene_command_i2c_read(dev, msg[0].addr, |
| 132 | msg[0].buf, msg[0].len, |
| 133 | msg[1].buf, msg[1].len, 0)) |
| 134 | goto done; |
| 135 | |
| 136 | if (num == 1 && !(msg[0].flags & I2C_M_RD)) |
| 137 | if (!ngene_command_i2c_write(dev, msg[0].addr, |
| 138 | msg[0].buf, msg[0].len)) |
| 139 | goto done; |
| 140 | if (num == 1 && (msg[0].flags & I2C_M_RD)) |
| 141 | if (!ngene_command_i2c_read(dev, msg[0].addr, NULL, 0, |
| 142 | msg[0].buf, msg[0].len, 0)) |
| 143 | goto done; |
| 144 | |
| 145 | up(&dev->i2c_switch_mutex); |
| 146 | return -EIO; |
| 147 | |
| 148 | done: |
| 149 | up(&dev->i2c_switch_mutex); |
| 150 | return num; |
| 151 | } |
| 152 | |
| 153 | |
| 154 | static u32 ngene_i2c_functionality(struct i2c_adapter *adap) |
| 155 | { |
| 156 | return I2C_FUNC_SMBUS_EMUL; |
| 157 | } |
| 158 | |
| 159 | static struct i2c_algorithm ngene_i2c_algo = { |
| 160 | .master_xfer = ngene_i2c_master_xfer, |
| 161 | .functionality = ngene_i2c_functionality, |
| 162 | }; |
| 163 | |
| 164 | int ngene_i2c_init(struct ngene *dev, int dev_nr) |
| 165 | { |
| 166 | struct i2c_adapter *adap = &(dev->channel[dev_nr].i2c_adapter); |
| 167 | |
| 168 | i2c_set_adapdata(adap, &(dev->channel[dev_nr])); |
| 169 | adap->class = I2C_CLASS_TV_DIGITAL | I2C_CLASS_TV_ANALOG; |
| 170 | |
| 171 | strcpy(adap->name, "nGene"); |
| 172 | |
| 173 | adap->algo = &ngene_i2c_algo; |
| 174 | adap->algo_data = (void *)&(dev->channel[dev_nr]); |
| 175 | adap->dev.parent = &dev->pci_dev->dev; |
| 176 | |
| 177 | return i2c_add_adapter(adap); |
| 178 | } |
| 179 | |